I was looking at Wiggle's site and in their description about the rear brake application for Hope M4s is this: Rear Rear 183/6(B) IS. Does this mean that the caliper body itself is IS or do they just ship it with an IS adapter? The latter makes more sense to me since most rear mounts are IS.
I looked on the Hope site and it appears that the new M4s are all PM caliper bodies. My plan is to use the Hayes mounts that are already on my bike and install PM compatible calipers. Before I order I'd just like to confirm what I'm getting.
Mtbr's 2016 Winter Biking GearReviews and Roundups
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Thread: ? abour rear Hope M4